Control of zebra mussels in flow-through service water systems
AssigneeASI Group Ltd.
InventorCarmelo Sferrazza
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Abstract
A method for controlling bivalve growth in a service water system of a plant is disclosed. Upon detecting an increase in the number of veligers or settlement stage bivalves, chlorine anion is introduced into the service water to obtain a chlorine anion concentration of between 0.10 and 2.0 mg/l for a period of 10 to 40 days. Also disclosed is a two-stage method for controlling bivalve growth in a service water system.
Claims28
A two-stage method for controlling bivalve growth in a service water system of a plant wherein service water is drawn from a body of water and generally continuously flowed through the service water system, the method comprising:
- a. monitoring the body of water for the presence of veligers and/or early stage bivalves;
- b. when an increase in the concentration of veligers and/or early stage bivalves is detected, introducing chlorine anion into the service water of the service water system in an amount sufficient to obtain a steady state chlorine anion concentration of 0.1 to 2.0 mg/l;
- c. maintaining the steady state concentration of chlorine anion in the service water of the service water system for a first treatment period of 10 to 40 days;
- d. monitoring the body of water for the presence of pediveligers and/or settlement stage bivalves;
- e. when an increase in the concentration of pediveligers and/or settlement stage bivalves is detected, introducing chlorine anion into the service water of the service water system in an amount sufficient to obtain a steady state chlorine anion concentration of 0.1 to 2.0 mg/l;
- f. maintaining the steady state concentration of chlorine anion in the service water of the service water system for a second treatment period of 10 to 40 days.
A method for controlling bivalve growth in a service water system of a plant wherein service water is drawn from a body of water and generally continuously flowed through the service water system, the method comprising:
- a. monitoring the body of water for the presence of veligers and/or settlement stage bivalves;
- b. when an increase in the concentration of veligers and/or settlement stage bivalves is detected, introducing chlorine anion into the service water of the service water system in an amount sufficient to obtain a steady state chlorine anion concentration of 0.1 to 2.0 mg/l;
- c. maintaining the steady state concentration of chlorine anion in the service water of the service water system for 10 to 40 days.
Dependencies are inferred from the claim text.